19805849

素因数分解:

$7^4\times {\mathrm{73}}^1\times {\mathrm{113}}^1$

素因数の和:214

約数の個数: 20

約数和(自身を含む): 23629236

約数和(自身を除く): 3823387

約数列:

[1, 7, 49, 73, 113, 343, 511, 791, 2401, 3577, 5537, 8249, 25039, 38759, 57743, 175273, 271313, 404201, 2829407, 19805849]

約数ペア:

[(1, 19805849), (7, 2829407), (49, 404201), (73, 271313), (113, 175273), (343, 57743), (511, 38759), (791, 25039), (2401, 8249), (3577, 5537)]